Heavy chuck type drive axle wheel end assembly

Abstract

The invention discloses a heavy chuck type drive axle wheel end assembly, which comprises a brake disc assembly, a hub bearing unit, a disc brake assembly, a half shaft, a half shaft bolt, an axle housing assembly and a locking nut, wherein the brake disc assembly is installed on the hub bearing unit, is fixed through the half shaft bolt and is matched with the disc brake assembly, and the hub bearing unit is installed on the axle housing assembly and is fixed through the half shaft bolt. The hub and brake disc integrated structure is achieved, the function of bearing braking force of the brake disc is achieved, the function of bearing wheel edge loads of the hub is achieved, the hub is omitted for the disc type wheel end, and therefore the weight and the cost of the wheel end are reduced;the hub bearing unit does not need to be disassembled when the brake disc is replaced, good assembly of the hub bearing unit can be ensured, the service life is greatly prolonged, and the whole vehicle bearing and reliability requirements are met; the inner diameter of the second cavity is increased by about 10% compared with the inner diameter of a common brake disc, and the heat dissipation capacity of the brake disc is improved.

Description

technical field [0001] The invention belongs to the technical field of heavy chuck type drive axle wheels, and in particular relates to a heavy chuck type drive axle wheel end assembly. Background technique [0002] In the field of heavy-duty trucks, with the guidance of national policies and customers' higher and higher requirements for the safety, high efficiency and energy saving of road transport vehicles, disc drive axles will quickly become the mainstream configuration of road vehicles. [0003] At present, at home and abroad, due to the existence of the double-tire arrangement structure of the heavy-duty disc drive axle, the distance between the brake disc and the hub bearing is relatively large, and the brake disc can only be located on the inner side of the hub bearing, and the structure connected to the hub . Since the brake disc is a consumable part, it is inevitable to replace the brake disc in the life cycle of the whole vehicle. Under the existing disc wheel e...

AI Technical Summary

Problems solved by technology

Since the brake disc is a consumable part, it is inevitable to replace the brake disc in the life cycle of the whole vehicle. Under the existing disc wheel edge structure, the wheel hub and hub bearing must be disassembled to replace the brake disc, and the wheel hub bearing of the rear axle The installation accuracy is very high, and after-sales maintenance is difficult to meet the original assembly requirements of the wheel hub bearings. Therefore, when the drive axle replaces the brake disc, it is easy to reduce the service life of the wheel hub bearings, and affect the bearing capacity and reliability of the drive axle; The bridge bears a large load and generates a lot of braking energy, which increases the temperature of the brake disc. At present, the inner diameter of the neck of the brake disc is generally about 200mm, which is prone to the phenomenon of slow heat dissipation of the brake disc, so that the brake disc is prone to heat cracks and cracks. Reduced service life of wheel bearings

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